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Live IANA Timezone Engine • Auto-DST

EST to MST Time Converter (New York to Denver)

Convert EST (Eastern Time (US & Canada), New York) to MST (Mountain Time (US & Canada), Denver) instantly. View live clocks, 24-hour comparison table, best meeting overlap hours, and developer code snippets.

EST — New YorkAmerica/New_York
8:00 AM
Fri, Oct 16 (08:00)Awake / Flex
MST — DenverAmerica/Denver
6:00 AM
Fri, Oct 16 (06:00)Sleeping

Interactive Hour Converter (EST → MST)

Drag slider to test any hour
When it is in EST (New York):
9:00 AM (09:00)
It is in MST (Denver):
7:00 AM (07:00)

24-Hour EST to MST Time Conversion Table

Side-by-side hourly reference with business hours overlap indicators.

EST (New York)24hMST (Denver)24hStatus in MST
12:00 AM00:0010:00 PM22:00
Awake / Flex
1:00 AM01:0011:00 PM23:00
Sleeping
2:00 AM02:0012:00 AM00:00
Sleeping
3:00 AM03:001:00 AM01:00
Sleeping
4:00 AM04:002:00 AM02:00
Sleeping
5:00 AM05:003:00 AM03:00
Sleeping
6:00 AM06:004:00 AM04:00
Sleeping
7:00 AM07:005:00 AM05:00
Sleeping
8:00 AM08:006:00 AM06:00
Sleeping
9:00 AM09:007:00 AM07:00
Awake / Flex
10:00 AM10:008:00 AM08:00
Awake / Flex
11:00 AM11:009:00 AM09:00
Work Hours★ Best Meeting Overlap
12:00 PM12:0010:00 AM10:00
Work Hours★ Best Meeting Overlap
1:00 PM13:0011:00 AM11:00
Work Hours★ Best Meeting Overlap
2:00 PM14:0012:00 PM12:00
Work Hours★ Best Meeting Overlap
3:00 PM15:001:00 PM13:00
Work Hours★ Best Meeting Overlap
4:00 PM16:002:00 PM14:00
Work Hours★ Best Meeting Overlap
5:00 PM17:003:00 PM15:00
Work Hours★ Best Meeting Overlap
6:00 PM18:004:00 PM16:00
Work Hours
7:00 PM19:005:00 PM17:00
Work Hours
8:00 PM20:006:00 PM18:00
Awake / Flex
9:00 PM21:007:00 PM19:00
Awake / Flex
10:00 PM22:008:00 PM20:00
Awake / Flex
11:00 PM23:009:00 PM21:00
Awake / Flex

Developer Code Snippets (EST to MST)

JavaScript / TypeScript (Intl API)
// Convert current time from EST (America/New_York) to MST (America/Denver)
const now = new Date();
const inMST = new Intl.DateTimeFormat('en-US', {
  timeZone: 'America/Denver',
  dateStyle: 'medium',
  timeStyle: 'long'
}).format(now);
console.log(inMST);
Python 3.9+ (zoneinfo)
# Python 3.9+ using standard zoneinfo
from datetime import datetime
from zoneinfo import ZoneInfo

dt_est = datetime.now(ZoneInfo("America/New_York"))
dt_mst = dt_est.astimezone(ZoneInfo("America/Denver"))
print(f"EST: {dt_est.strftime('%Y-%m-%d %H:%M %Z')}")
print(f"MST: {dt_mst.strftime('%Y-%m-%d %H:%M %Z')}")

Frequently Asked Questions (EST → MST)

How do I convert EST to MST?

EST (Eastern Time (US & Canada)) uses the IANA timezone identifier America/New_York (standard offset -05:00), while MST (Mountain Time (US & Canada)) uses America/Denver (standard offset -07:00). Use the interactive slider or the 24-hour table above to convert any hour accurately with automatic Daylight Saving Time (DST) adjustment.

What are the best meeting hours between New York and Denver?

Check the rows highlighted with "Best Meeting Overlap" in the 24-hour table above, where both EST and MST fall within standard 9:00 AM – 5:00 PM working hours.

Does EST to MST account for Daylight Saving Time (DST)?

Yes. Castov uses the browser's native IANA tzdb engine (America/New_York and America/Denver), which automatically applies official Daylight Saving Time transitions.

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